Definition of "However" :
adverb: despite anything to the contrary (usually preceding a concession)
"Although I'm a little afraid, however I'd like to try it."
adverb: in whatever way or manner
"Victory, however it was brought about, was sweet."
adverb: to whatever degree or extent
"The results, however general, are important."
adverb: by contrast; on the other hand
"The first part was easy; the second, however, took hours."